The content of atom on the surface of nanoparticle as a function of Pt nanoparticle diameter
|
|
|
Energy of atom on the surface is much higher than that in bulk
(105 – 107 times)
|
|
↓
|
Change of optical, electrical, or catalytic property
|
Almost cancer cells are dead at the concentration of 10 ppm of NANOVERTM
|
NANOVERTM
has strong antimicrobial
efficacy against various
microorganisms. The table
shows the value of the minimal
inhibitory concentration
(MIC) of each NANOVERTM
SCV-WA series type
to inhibit the fission or
multiplication of each micro-organism.
The other types are presumably
equal. The MIC is defined
as the lowest concentration
of NANOVERTM that
completely inhibits the
growth of microoganisms.
MIC of NANOVERTM
to various microorganisms[unit:
μg/ml]
Bacteria |
characteristies
|
MIC for NANOVERTM
SCV-WA |
Esherichia coli
ATCC 25922 |
The
pollution
indicator
of
food
and
drinking
water
|
5 |
Esherichia coli
0157 |
The
bacteria
to
cause
food
poisoning
by
producing
velo
toxin
|
5
|
|
Pseudomonas
aeruginosa
ATCC27853
|
The
bacteria
to
cause
the
decay
of
fishes
and
shells
|
5 |
|
Staphylococcus
aureus
ATCC29213
|
The
bacteria
to
cause
suppuration,
ichoremia
and
food
poisoning,
etc.
|
5 |
|
Non-spore
forming
Bacillus
subtilis
|
The
bacteria
to
cause
the
decay
of
milk,
meat,
etc.
|
5 |
|
Spore
forming
Bacillus
subtilis
|
The
bacteria
to
cause
the
decay
of
milk,
meat,
etc.
|
5 |
|
Salmonella
typhimurium
|
The
bacteria
to
cause
typhoidal
diseases
and
food
poisoning,
etc.
|
5 |
|
MRSA
|
The
bacteria
to
cause
in-hospital
infection
|
5 |
|
Candida
albicans
|
It is a kind of fungi that give rise to candida inflammation.
|
5 |
|
P.
Vulgaris
|
It is a kind of fungi that give rise to candida inflammation.
|
5 |
|
Enterococcus
faecalis
ATCC29212
|
It is generated from contaminated food-materials or inferior manufacturing process.
|
5 |
|
Test
method: Agar-dilution method
defined by NCCLS
Department of Internal Medicine, The Catholic University of Korea
The 54th Conference of The Korean Association of Internal Medicine (2003.10.25)
Green algae are perfectly dead after 60 minutes.
|
|
NANOVERTM is not Ag ion, but metallic nanoparticles
|
NANOVERTM is not Ag ion, but metallic nanoparticles
The binding energy of Ag core electron of NANOVERTM is higer than Ag bulk (Ag foil) due to
size effect of nanoparticles, which is consistent with the known research results.
In contrast, the binding energy of Ag ion is lower than Ag bulk.
|
-->uniform shape and very narrow particle distribution
NANOVERTM (final nanoparticles) consists of several
smaller nanoparticles, called primary nanoparticles.
|
TEM image after dilution of NANOVERTM
Final nanoparticles are dissociated into several primary
nanoparticles, which appear such as satellites
|
→
Good long-term stability 
Absorption band at approx. 400 nm appears due to surface plasmon of silver nanoparticle.
The absorption band appears even after a year and no absorption band shows at longer wavelength
(~ 700 nm) by aggregation of nanoparticles. →
good stability as a function of time
|
Bacterial growth is present
in laboratory tests
|
Nanover Handsanitizer kills 99.99% of germs that may cause disease
|
100℃, 1mm x 1mm
NANOVERTM was coated on Si wafer. Above AFM (atomic force microscopy) image shows no sign of
aggregation → Good dispersion on the surface and good adhesion
|
Method : KS K 0693
Sample : dipping in the solution of SCV-WA702 (10 ppm) for 30 min.
Microorganism : Staphylococcus aureus ATCC 6538
|
|
|
|
|
after 50 times washing
(99.9%)
|
|
